Datasheet4U Logo Datasheet4U.com

LT4321 - PoE Ideal Diode Bridge Controller

General Description

The LT®4321 is a dual ideal diode bridge controller that enables a Power over Ethernet (PoE) powered device (PD) to receive power in either voltage polarity from RJ-45 data pairs, spare pairs, or both.

The LT4321 and eight N-channel MOSFETs replace the eight diodes in a passive PoE rectifier bridge.

Key Features

  • n n n n.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
LT4322 High-Voltage Active Rectifier Controller Analog Devices
LT431 LED LED Technology
LT433 Photo DMOS-FET Relay Letex Technology
LT4356-2 Surge Stopper Intersil Corporation
LT4356-2 Surge Stopper Linear

Other Datasheets by Linear Technology (now Analog Devices)

Part Number Description
LT4320 Ideal Diode Bridge Controller
LT4320-1 Ideal Diode Bridge Controller
LT4351 MOSFET Diode-OR Controller
LT4356-1 Surge Stopper
LT4363 High Voltage Surge Stopper

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LT4321 PoE Ideal Diode Bridge Controller Features n n n n Description The LT®4321 is a dual ideal diode bridge controller that enables a Power over Ethernet (PoE) powered device (PD) to receive power in either voltage polarity from RJ-45 data pairs, spare pairs, or both. The LT4321 and eight N-channel MOSFETs replace the eight diodes in a passive PoE rectifier bridge. The LT4321 eases thermal design and increases delivered power. An internal charge pump allows an all-NMOS bridge eliminating larger and more costly PMOS switches. The LT4321 works with 2-pair and 4-pair applications. High impedance input sense pins prevent reverse current on unused pairs. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients.